83. H.264/AVC VIDEO PACKET AGGREGATION AND UNEQUAL ERROR PROTECTION FOR NOISY CHANNELS

Department: Electrical & Computer Engineering
Faculty Advisor(s): Pamela Cosman | Sunil Kumar

Primary Student
Name: Kashyap K Kambhatla
Email: kkambhat@ucsd.edu
Phone: 858-822-1250
Grad Year: 2013

Abstract
The quality of H.264/AVC compressed video delivery over bit-rate limited noisy wireless channels is limited by packet losses. One method of reliable transmission is aggregating H.264/AVC slices to form video packets with sizes adaptive to their importance. Larger packets are more likely to be in error but smaller packets cause more overhead. A second method is by assigning stronger channel code rates to more important slices and also exploiting the advantage of not protecting or even discarding some less important slices. We introduce a cross-layer dynamic programming approach that addresses both adaptive packet formation as well as optimal RCPC-channel code rate allocation simultaneously, to minimize the expected received video distortion measured as cumulative mean square error (CMSE). Simulation results for different slice sizes demonstrate that our proposed scheme performs better than either of the above two methods as well as better than baseline equal error protection (EEP) schemes over different AWGN channel SNRs.

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